Roget's Thesaurus: Entry 940 (Improbity)

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#940. Improbity. -- N. improbity[obs]; dishonesty, dishonor; deviation from rectitude; disgrace &c. (disrepute) 874; fraud &c. (deception) 545; lying &c. 544; bad faith, Punic faith; mala fides[Lat], Punica fides[Lat]; infidelity; faithlessness &c. adj.; Judas kiss, betrayal.

breach of promise, breach of trust, breach of faith; prodition|, disloyalty, treason, high treason; apostasy &c. (tergiversation) 607; nonobservance &c. 773.

shabbiness &c. adj.; villainy, villany[obs]; baseness &c. adj.; abjection, debasement, turpitude, moral turpitude, laxity, trimming, shuffling.

perfidy; perfidiousness &c. adj.; treachery, double dealing; unfairness &c. adj.; knavery, roguery, rascality, foul play; jobbing, jobbery; graft, bribery; venality, nepotism; corruption, job, shuffle, fishy transaction; barratry, sharp practice, heads I win tails you lose; mouth honor &c. (flattery) 933.

V. be dishonest &c. adj.; play false; break one's word, break one's faith, break one's promise; jilt, betray, forswear; shuffle &c. (lie) 544; live by one's wits, sail near the wind.

disgrace oneself, dishonor oneself, demean oneself; derogate, stoop, grovel, sneak, lose caste; sell oneself, go over to the enemy; seal one's infamy.

Adj. dishonest, dishonorable; unconscientious, unscrupulous; fraudulent &c. 545; knavish; disgraceful &c. (disreputable) 974; wicked &c. 945.

false-hearted, disingenuous; unfair, one-sided; double, double- hearted, double-tongued, double-faced; timeserving[obs], crooked, tortuous,insidious, Machiavelian, dark, slippery; fishy; perfidious, treacherous, perjured.

infamous, arrant, foul, base, vile, ignominious, blackguard.

contemptible, unrespectable, abject, mean, shabby, little, paltry, dirty, scurvy, scabby, sneaking, groveling, scrubby, rascally, pettifogging; beneath one.

low-minded, low-thoughted[obs]; base-minded.

undignified, indign|; unbecoming, unbeseeming[obs], unbefitting; derogatory, degrading; infra dignitatem [Latin: beneath one's dignity]; ungentlemanly, ungentlemanlike; unknightly[obs], unchivalric[obs], unmanly, unhandsome; recreant, inglorious.

corrupt, venal; debased, mongrel.

faithless, of bad faith, false, unfaithful, disloyal; untrustworthy; trustless, trothless[obs]; lost to shame, dead to honor; barratrous.

Adv. dishonestly &c. adj.; mala fide[Lat], like a thief in the night, by crooked paths.

Int. O tempora[obs]! O mores! [Cicero].

Phr. corruptissima respublica plurimae leges [Lat][Tacitus].